From bbdfde856b8c20fa3def98ea4610fef02aa316d7 Mon Sep 17 00:00:00 2001
From: Eric Traut <eric@traut.com>
Date: Fri, 25 Oct 2024 14:32:33 -0700
Subject: [PATCH] Changed the evaluated type of an `in` or `not in` operator to
 be `bool` if the LHS doesn't support containment. Previously, the expression
 evaluated to `Never`. This addresses #9327.

---
 packages/pyright-internal/src/analyzer/operations.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/pyright-internal/src/analyzer/operations.ts b/packages/pyright-internal/src/analyzer/operations.ts
index fceccba4a455..d71c582b19d7 100644
--- a/packages/pyright-internal/src/analyzer/operations.ts
+++ b/packages/pyright-internal/src/analyzer/operations.ts
@@ -1198,7 +1198,7 @@ function validateContainmentOperation(
                         deprecatedInfo = returnTypeResult.magicMethodDeprecationInfo;
                     }
 
-                    return returnTypeResult?.type;
+                    return returnTypeResult?.type ?? evaluator.getBuiltInObject(errorNode, 'bool');
                 }
             );
         }